quak backup retries failed requests for longer (closes #165)

src/retry.ts exports UNATTENDED_RETRY_OPTIONS beside the unchanged
default: 10 attempts, a 1 s base delay and a 60 s cap, so a request that
keeps failing waits at most 243 s before it gives up. bin/quak.ts loads
the backup's session with them, so its refresh, ML data and downloads
all use them; every other command keeps the default. What is retried
and the backoff formula are unchanged.

Model: opus-5-5

TODO.md

@@ -25,6 +25,14 @@ declares one.
 
 # Completed Steps
 
+- 2026-10-05: `quak backup` retries a failed request for longer than the other
+  commands do (issue 165). `src/retry.ts` exports `UNATTENDED_RETRY_OPTIONS`
+  beside the unchanged default: 10 attempts, a 1 s base delay and a 60 s cap, so
+  a request that keeps failing waits at most 243 s before it gives up.
+  `bin/quak.ts` loads the backup's session with them, so its refresh, ML data
+  and downloads all use them. What is retried and the backoff formula are
+  unchanged.
+
 - 2026-10-03: The download-albums example test no longer fails on a disk with
   under 50 GiB free (issue 160). It opens its libraries with
   `freeBelowBytes: 0`, so the free space of the disk it runs on cannot shrink